his family and his daughter should not have to suffer for his fooling around. yes she will eventually know about you but why does she have to know while he is far away and can't do anything about it if the woman decides to freak out? he won't lose custody but a judge cannot control a mothers actions. the only thing he would be able to do if she decides not to let him see his child is file a motion in court and hold another hearing, it will go on and on. it sounds to me like you truly haven't gotten over his cheating, you say you do, but i know how difficult it is and how impossible is it to forget. i was cheated on once and i never got over, never. i wanted to, but it's always there like a ghost. i think if you truly trusted him you wouldn't demand this of him in the first place. i don't know particulars and i don't know you personally but i speak objectively and out of personal experience and i hope you don't take offence, i'm truly trying to extend my help to you, but it's his decision and if he decides not do it then you'll either have to do it yourself or leave him if it bothers you that much. like i said before, you cannot control what he does. this is his thing and i'm sure he's suffering over it. sometimes you cannot punish a person, sometimes you just have to sit back and watch others do what they're gonna do. i believe you're trying to control a situation that you just can't. and the more the try the more frustrating it is for you. let it go. his cheating wasn't your fault. it isn't your responsibility to punish him for this. her knowing about you isn't going to prove anything and it's not going to be beneficial.